1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 2002 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26 
  27 #ifndef _BARRIER_H
  28 #define _BARRIER_H
  29 
  30 #pragma ident   "%Z%%M% %I%     %E% SMI"
  31 
  32 /*
  33  * APIs for the barrier synchronization primitive.
  34  */
  35 
  36 #include <synch.h>
  37 
  38 #ifdef __cplusplus
  39 extern "C" {
  40 #endif
  41 
  42 typedef struct barrier {
  43         pthread_mutex_t bar_lock;       /* protects bar_numin */
  44         int bar_numin;                  /* current number of waiters */
  45 
  46         sema_t bar_sem;                 /* where everyone waits */
  47         int bar_nthr;                   /* # of waiters to trigger release */
  48 } barrier_t;
  49 
  50 extern void barrier_init(barrier_t *, int);
  51 extern int barrier_wait(barrier_t *);
  52 
  53 #ifdef __cplusplus
  54 }
  55 #endif
  56 
  57 #endif /* _BARRIER_H */